[eLstar]

Originally Posted by Mr. Bushido

Spoiler:

i believe those are iron chains, or because Apis arc is a filler arc not part of the manga... so it may have been the error of the animators, and not Oda himself.

I figured as much. Stupid animators...this is what happens when you make filler arcs. You just might accidentily screw up a future storyline.